The average age of 30 students in a class is 15…

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The average age of 30 students in a class is 15 years. If 6 students of this class have the average age of 16 years, then the average age of the remaining 24 students would be-

  1. A. 14 yrs
  2. B. 14 yrs 3 mths
  3. C. 14 yrs 6 mths
  4. D. 14 yrs 9 mths

Answer: Option D

Here is complete explanation of The average age of 30 students in a class is 15….

Solution(By ExamCraze Team)

Sum of the ages of 24 students
= (15 × 30) - (16 × 6)
= 450 - 96
= 354
∴ Required average
= $$left( {frac{{354}}{{24}}} right)$$
= $$14frac{3}{4}$$ yrs
= 14 yrs 9 mths

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